Improvement in devices for stopping leaks in boiler-tubes



PATBNTED DEG. 27, 1864.' R. LAVBRY L s. STUART. DEVICE PoR STOPPING LBAKS IN BOILER TUBES@ 9?@ @web UNITED STATES PATENT OFFICE.

IMPROVEMENT IN DEVICES FOR STOPPING LEAVKS IN BILER-TUBES.

Specification forming part of Letters Patent No. 15,61 S, dated December 27, 1864.

saine, reference being had to the accompanying drawings, forming part of this specification, in whichl Figure 1 is a transverse vertical section of this invention, the line :n Fig. 2, indicating the pla-ne ofsection. Fig. 2 is a longitudinal central section of the same, the plane of section being indicated by tbe line y y,-'Fig. 1.

Similar letters of reference indicate like parts.

- This invention consists in a splitring, provided With ears, and with a bead fitting to the cavi-ty of a boiler-tube close behind the, tube-sheet, and fastened therein by means of a wedge driven in its gap, in combination with an open cap tittin g over the end ot' the tube, and fastened to `its place by bolts extending froni the ears of the ring through holes in the caprini suoli a manner that by ,se-A

curing the ring.y in'the end of the tnbethe cap can be readily secured without drilling holes in 'the tube-sheet, and by the combined action of the ring and cap a leak in the joint between the tube and the tubesheet can be 'effectually stopped without closing up the tube.

A represents a portion of the tube-sheet of a steamboiler, in which the tubes B are fastened in the usual manner.

'.lhe tool generally used in securing boiler tubes to the tube-sheets produces a cavity, a, close behind the tube-sheet, as clearly s hown in Fig. 2, and the end ot' the tube is turned over the outer edge of the hole in the sheet, thus securing the tube in its place and pressing, it up tight all round against the circum- -ference of the hole.

It' a leak occurs in the joint between the tube and4 tubeshect, We introduce 'a split ring, (l, which is provided with a bead, b,V to lit into the cavity a of the tube closebehind the tube-sheet. A wedge, D, drivenl into the gap of the ring, after the same has been adjusted in its place, spreads the saine and forces it ont-against the inner circumference o f the tube, and by these means the tube is pressed up tight against the hole in the tubesheet. AThe ring'G is provided with ears c, projecting inward, and fromV these ears extend bolts d through holes in the open cap E, which fits over the end of the tube, as clearly shown in Fig. 2. Said bolts may either pass through the ears or theyl may be hinged thereto, or the ears may be slotted, as shown inthe drawings, so that thebolts can be made and-connected to the bolts 'in any other convenient manner, and by the action of the bolts'the cap 4is pressed up tight against the outer surface ofthe tube-sheet, and by placing suitable packing between it and the tubesbeet any leak occurring round theend of the tube can be eiectually stopped.. The caps can thus be secured to the tube-sheet without drilling holes' in the same,and they canbe applied with little loss of time, and,- by the combined action of the ring and open cap, leaks occurringin the ends of tubes canbe stopped 4more eectually than by either alone.

.The caps and rings do not obstruct the draft, and they can be made of castiron`,'and kept onhand so that they can be applied ata moments'notiee.

y Having thus described our invention, the

following is what We claim as newvand desire 

